2015-2023
2010-2014
2005-2009
1999-2004
1994-1998
1979-1993
Installation Time
(approx) a Day
Difficulty Level:
Mechanical expertise or professional installation required.
Installation Guides
No guide available for this part yet.
FREE 1 to 3-Day Delivery on Orders $119+ Details
Talk to a Mustang Sales Tech
1-877-887-1105
M-F 8:30A-11P, Sat-Sun 8:30A-9P
-
Add Details
- Change Vehicle
- Mustang Builds Gallery
Find Gears for your Mustang
USA Standard Gear Ring and Pinion Gear Kit; 3.08 Gear Ratio (86-93 Mustang GT)Find parts that fit my vehicle
Item 402940
Mustang Sales Tech
Verify parts fit & get product recommendations
M-F 8:30A-11P, Sat-Sun 8:30A-9P
$0.00
22 Reviews
Our Price
$374.89 kit
Ship to: 43215
Please enter a valid US or CA postal code
We're sorry, zip can't be updated at this time.
Will this fit your Vehicle?
Saved - View your saved items
We're sorry. We couldn't save this product at this time.
or use
Product Information
Features, Description, Reviews, Q&A, Specs & Installation
Description
Quick to Cruise. With the USA Standard Ring Gear and Pinion Kit in the 3.08 gear ratio, you give your Pony that extra burst of acceleration at the starting line. As you gear up, your acceleration improves dramatically, making this Ring Gear and Pinion Kit a great choice for both racing and regular street use. Getting up to speed and merging is a lot easier when you have that extra acceleration under the hood.
Power Up without Sacrificing Economy. When you want that extra kick of speed, but don't want to spend a lot more at the gas pump, the USA Standard Ring Gear and Pinion Kit in the 3.08 gear ratio is a solid choice. You can improve your 0 to 60 mph time without tanking you fuel economy.
Reliable Construction. Changing your Ring Gear and Pinion Kit is time consuming and not something you want to do regularly. With the solid steel and precision-machined construction of this Kit, you get years of use.
Contact a Mechanic. While you can install the Ring Gear and Pinion Kit yourself, the process is intricate and requires considerable expertise for a good fit. Also, a tune-up post installation to sync the onboard computer with the new gear ratio is a good idea.
USA Standard Warranties. USA Standard Gear offers different warranties on different parts. With the Ring Gear and Pinion Kit, you get a one-year warranty against manufacturing defects. For more information about limitations and exclusions, please read the manufacturer's warranty.
Application. This USA Standard Ring Gear and Pinion Kit in the 3.08 gear ratio fits on all 1986-1993 Mustang GT models.
Fitment:
- 1986 Ford Mustang
- 1987 Ford Mustang
- 1988 Ford Mustang
- 1989 Ford Mustang
- 1990 Ford Mustang
- 1991 Ford Mustang
- 1992 Ford Mustang
- 1993 Ford Mustang
USA Standard Gear ZG F8.8-308
CA Residents: 
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
Installation & What's in the Box
Installation Info
What's in the Box
- (1) Ring Gear
- (1) Pinion
- (10) Ring Gear Bolts
4.5
Customer Reviews (22)
Review Summary
Apr 14, 2018
Review shared from USA Standard Gear Ring and Pinion Gear Kit; 3.55 Gear Ratio (86-93 Mustang GT)
1988 LX - MarcN
Installation Cost: $250-$500
Installation Time: Shop Install
Very Satisfied
I received my 3.55 gears within a week of ordering them. I was very satisfied with the shipping, the guality and have had no issues since installing them.
Bang For Your Buck 5/5
Dec 11, 2014
Review shared from USA Standard Gear Ring and Pinion Gear Kit; 3.55 Gear Ratio (86-93 Mustang GT)
1988 GT - Erikkk30
Great product
Great product. It took awhile to install but once it was on you can feel the difference at a dead stop launch.
Aug 29, 2022
Review shared from USA Standard Gear Ring and Pinion Gear Kit; 3.73 Gear Ratio (05-10 Mustang V6)
2008 V6 - LoganLT5U4294195
Installation Time: Weekend
Great Gears!
Tolerances were great! With a rebuild kit, the new pinion and ring gear went in, and I was able to perfectly center the mating surfaces with the transfer paint. Super quiet and holds up well.
Fit 5/5
Quality 5/5
Bang For Your Buck 5/5
Oct 7, 2020
Review shared from USA Standard Gear Ring and Pinion Gear Kit; 3.73 Gear Ratio (05-10 Mustang V6)
2006 V6 - KevinA
Installation Cost: $250-$500
Installation Time: Shop Install
rearend overhaul
I got this and the nitro bearing kit, worked perfect, no strange noises or anything just a nice mod that makes my pony seem a little more responsive
Fit 5/5
Quality 5/5
Bang For Your Buck 5/5
Sep 27, 2020
Review shared from USA Standard Gear Ring and Pinion Gear Kit; 3.31 Gear Ratio (10-14 Mustang GT)
2012 GT - RidgeParkin
Installation Time: Afternoon
Amazing top end!
The 3.31 gears are great for the top end that the 5.0 mustang has! I like them a lot more than any other gears.
Fit 5/5
Quality 5/5
Bang For Your Buck 5/5
Sep 12, 2020
Review shared from USA Standard Gear Ring and Pinion Gear Kit; 3.73 Gear Ratio (99-04 Mustang V6)
2001 V6 - AaronHoffmann
Installation Time: Afternoon
3.73 gears
This product looked well made and has made a huge difference down the road
Fit 5/5
Quality 5/5
Bang For Your Buck 5/5
Jun 19, 2020
Review shared from USA Standard Gear Ring and Pinion Gear Kit; 4.11 Gear Ratio (94-98 Mustang GT)
1998 GT - Ramiro100
Installation Time: Less than 1 Hour
Sr throttle body
American muscle have the best prices and fastest shipping i highly recommend American muscle for many reasons and high performance parts.
Fit 5/5
Quality 5/5
Bang For Your Buck 5/5
Jan 31, 2020
Review shared from USA Standard Gear Ring and Pinion Gear Kit; 3.73 Gear Ratio (94-98 Mustang V6)
1998 V6 - JordanK
Installation Time: Full Day
Great Product
Fairly easy to install if you have experience with working on cars. Adds the pick up the v6 needs and turns it into a pretty fun car!
Performance Gain 4/5
Fit 5/5
Jan 26, 2020
Review shared from USA Standard Gear Ring and Pinion Gear Kit; 3.27 Gear Ratio (10-14 Mustang GT)
2014 GT - emcandrew126
Installation Time: Weekend
Absolute Garbage
I thought I ordered Ford Racing gears. I guess I messed up my cart and ordered these USA Gears instead. Pinion depth is stamped 3.06 on the face of the pinion. I could only get it 2.58" with NO shims, new bearings and new races. And don't even get me started on ring gear runout. I've read that USA Gears are Yukon gears that don't meet Yukon quality control standards. But I don't know... Anyway, do yourself a favor and get Ford gears. I've been installing my own 8.8 gears for the better part of 20 years, and NEVER have I had a set that were THIS badly made. I fought setup for a full day and couldn't even get it remotely close to right. The only reason I gave it one star is because they came in a good looking box that had "USA" on it... }:-|
Nov 7, 2019
Review shared from USA Standard Gear Ring and Pinion Gear Kit; 4.30 Gear Ratio (94-04 Mustang Cobra)
1997 Cobra - Steves
Installation Time: Full Day
Great gears
Excellent product. Install what’s technical. Don’t recommend if you have no experience. When properly installed they are what every 4.6 liter needs
Performance Gain 4/5
Fit 4/5
Questions & Answers
No questions about this product yet.
Ask the First Question
Will It Fit My Mustang
- GT - 87, 88, 89, 90, 91, 92, 93
- LX - 87, 88, 89, 90, 91, 92, 93
- Other - 86
